Aeroplane.



W. B. ALEXANDER.

ABROPLANE.

APPLIUATION FILED Immo, 1911 994,106, l l Patented June 6,1911.

out nece PATENT' OFFICE.

u .n.,LEX.iNDER, OF MONTREAL, QUEBEC, CANADA.

AERDPLANE Siti-at., 'Lilith To util unto i calvi.

` amara; llore Anexreal in the Prov- .ion of Canrolanes; and I do llovving `is a full, tion et the same.

more particularly ie planes or surfaces le in motion,

stable equi- 'that is l. au nnatieally maintain '.u'dnniry mnditions With-- the employment of mov ing pai llerena, 'warping or flex-- ing' "wii'lgsy or `he lilre.

` Other objects the advantage of the invention will be apparent to those skilled inthe art from a consideration of the follow@ description accompanying drawings in which my invention described and illustrated, in which drawings-- i Figure l is a plan vieW vof an aeroplane constructed according to my invenition,V Fig.

vt2 is a side elevatimi thereof, and Fig.4 3 is adetail enlarged transverse section taken on. line 3m?, Fig. 1. v

My improved. aeroplane comprises a main `sustaining or lifting plane made up of two suil'abl laterally disposed. and oppositely projecting sections or wings 2 and 8 respectively curved from front toirear as shown in Fig. 2 such curvature being preferably parabolic. These plane sections ie'iay be constructed in any approved fashion, the trames thereof being here indicated ina-de 'up of the front andrear cross hars il, and ribs ii' over Which is'y stretched a suitalnle*fabric or covering 6. These Wings?, and 3era' inner' edges to' Ythe top side edges of a longitudinal body men'lber oit angular cross sectioii withY `do invardly mnverging closed sideswhioh n'iay be formed by stretching a f oi l over 'the lowei. anular :traine or v Speecation of Letters Patent.

"ieation filed February 10, 1911. Serial No. 607,824.

' with the air controlto provide secured at their` Patented June i fuselage indicated by the reference numeral 8, this frame tapering longitudinallyto the front as shown in Figs. l and 2' and. having the converging lower sides thereof forming for reasons to be pointed out later an angle ofsubstantially 100o with each other as f shown in Fig. 3, this frame forming the main frame of the aeroplane upon Which and between the converging sides thereof may be supported the pilots seat 9 and motor 10 for driving the propeller 11, it being understood that I do notconfine myself to the use of any particular means for propelling the aeroplane. This body member also acts as a iin oruheel to prevent drift or sdeivise movement and extends longitudinally beyond the plane 2 and projects at its forward end underneath and 1s connected to an auxiliary plane l2. This plane 1Q is placed at a distance in front of the lmain plane and may be provided with adjustable sidelsections or aileronsA 13 by means of Wl'iichvertical. steering is accomplished, Whilea rudder`1fl for lateral steerng is provided, such' ailerons and rudder being controlled by any suitable means a portlon .of which is indicated respectively by the numerals l5 and 16V but which is not necessary to be illustrated or described here in detail `as such means forms no part of my invention and would be readily supplied by any skilled mechanic. The aero plane may be supported when on the ground by any suitable means as# the skid 17 under the front plane and wheels 18 under the main plane.

Projecting laterally from vthe top side edges of the longitudinally intermediate` portionofthe lin (or that between the front and rear planes) are fianges 20 which I term baille iianges, these flanges being compara tively narroiiT v`and ypreferably tapering slightly freni front torea-r at which points they connect respectivelyjto the rear of the front plane and V.the lfront` of the rear plane; These 'flanges may taper in width from ii'ront to rear in Icorrespondence with the taper' of the rin, the lian ges being preferably throughout their length of a width equal Y l the flanges to be directed as just stated unof the iin.

to one half the depth of the corresponding loss oi lateral balance, such variation in pressure acting to restore balance as will be readily understood. These baille flanges prevent the' air from spilling over the upper edges of the fin or body and direct it under the rear plane, the expanding of the fin or body toward the rear end causing as will be readily understoodl a compression of.

the air, which compressed air is caused by der the main plane. These langes however do notextend laterally asullicient distance to affect theproper contact of/ the curved wings with the air (whereby the lift is obtained) but act in conjunction with the fin to cause the air to be somewhat compressed in meeting such plane and thereby increase its lifting capacity, the transverse widthV of the main plane being as shown in the drawings substantially greater than the combined width of the fin and baille flanges at the point of juncture of the latter with the plane. i

- By means of my improved arrangement the frame or fuselagewhich extends longitudinally to support the fore and aftbalancng plane 12 is employed to present a Vsurface acting both to maintain lateral balance, to prevent drift and to increase the total lifting capacity of the aeroplane with a comparatively small increase in the total weight.

It will be understood of course that for use in very gusty or stormy weather or in making sharp turns the aeroplane may if desired be fitted with ailerons `or other mov* able balancing parts although as such parts form no part of my invention they have 4not been here shown.

What I claim is'as followsz- 1. An aeroplane consisting of front and rear planes, an angle shaped lin extending between and connecting such -planes, and bailleilanges extending laterally from the topgusideedges of such linmthe said rear plane;V being of substantially greater' transverse""width than the combined width of the lin and baille llanges at the point of juncture ofthe said baille plates and plane.

2. An aeroplane consisting of a main sustaining plane made up of two laterally disposedand longitudinally curved sections, an open-topped hollow angle shaped lin located between such sections and to the upper top sides of which the said sections are connected, such angle-shaped fin extending longitudinally of the aeroplane beyond the said plane, baille flanges projecting laterallyA from the top side edges of such extended portion, the said plane sections being of substantially greater width than the saidy llanges. i Y 3. An aeroplane consisting of a main sustaining plane made up of tw'o laterally disposed and longitudinally curvedsections', an open-topped hollow angle shaped fm disposed longitudinally of the aeroplane .andlocated between such sectionsv and to the upper top sides Aof which the said sections are connected, such angle shaped fin extending at one end forwardly of the said main sustaining plane, and lower sides of such 1in forinl lng an angle with each of slightly greater than 90, baille flanges'projecting laterally from the top side edges of suchextended portion,the said plane sections being of substantially greater width than the said Hanges and anv auxiliary lifting plane placed at a distance in front of the main plane and to which the front end of such lin is connected. A

4. An aeroplane consisting of front and rear planes, and an angle-shaped fin extending between and connecting such planes vsuch lin ltapering toward the front of the aeroplane, and baille flanges projecting later- .sally from the top side edges of the said 1in wsuch baille flanges being throughout their length of a width substantially one-half' -the depth of the. adjacent portions of the sides of the fin.

5. An aeroplane ycomprising a main sustaining planemade up of two oppositely disposed sections, an auxiliary plane arranged in front of and spaced apart from such'plane, a longitudinally disposed frame of inverted triangular cross-section forming the main frame of the aeroplane and having the saidk main plane sect-ions connected to the rear portions of the top side edges there- A of and being connected at its front end to the auxiliary plane, such frame tapering toward the front and having the lower converging sides thereof fabricfcoveredLfor the purpose set forth.

6. An aeroplane comprising a main sustaining plane s made 4up of two oppositely disposed sections, an auxiliary-plane arranged in front of and spaced apart from such plane, a longitudinally disposed frame of inverted triangular cross-section forming the main frame of the aeroplane having f the said main plane sections connected yto the rear. portions of the top side edges thereof and being connected at its front end to the auxiliary plane, such frame tapering toward the front and having the lower converging sides thereof fabric covered, ande baille flanges projecting outwardly `from the ml'x'il'inry planas, Such Hm 111 testimony '-Nlleleu, have signed my nanna to this spemlm 1nv 1n tlmprsence O trw subscrbnwg wml M mmm ALEXANDER. 

